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參數(shù)資料
| 型號(hào)： | SA9106APA |
| 廠(chǎng)商： | SAMES |
| 元件分類(lèi)： | 電能質(zhì)量分析儀 |
| 英文描述： | SINGLE PHASE WATT MEASUREMENT IC WITH INTEGRATED 5 DIGIT LED DISPLAY DRIVER |
| 中文描述： | 單相電能計(jì)量集成電路5位LED顯示驅(qū)動(dòng)器，帶有集成 |
| 文件頁(yè)數(shù)： | 5/14頁(yè) |
| 文件大?。?/td> | 223K |
| 代理商： | SA9106APA |
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SA9106A
sames
5/14
Pin
PLCC
31
32
1
4
5
9
12
37
38
44
Pin
DIP
39
40
Designation
Description
TP39
TP40
TP1
TP4
TP5
TP9
TP12
TP37
TP38
TP44
Manufacturer's Test Pins (Leave unconnected)
PIN DESCRIPTION (Continued)
FUNCTIONAL DESCRIPTION
The SA9106A is a CMOS mixed signal Analog/Digital integrated circuit, which performs
bidirectional power calculations across a power range of 1000:1, to an overall accurancy
of better than 1% (± 1 count). An on-chip LED display driver directly drives a 5 digit (7
segment) LED display. The measured power is displayed in Watts.
The integrated circuit comprises of all the required functions such as two oversampling
A/D converters for the voltage and current sense inputs, power calculation and energy
integration. Internal offsets are eliminated through the use of cancellation procedures.
1.
Power Calculation
In the Application Circuit (Figure 1), the voltage drop across the shunt will be
between 0 and 50mV (0 to 80A through a shunt resistor of 625μ
). This voltage is
converted to a current of between 0 and 16μA, by means of resistors R
1
and R
2
.
The current sense input saturates at an input current of ±25μA peak.
For the voltage sense input, the mains voltage (230VAC) is divided down through
a divider to 14V. The resulting current into the A/D converter input is set at 14μA
at nominal mains voltage, via resistor R4 (1M
).
In this configuration, with a mains voltage of 230 V and a current of 80A, the
displayed power is 18 400 Watts.
2.
LED Display Driver
The SA9106A has an on-chip LED display driver capable of driving 5 digit (7
segment) common cathode digits as well as a sign LED.
The sign LED is addressed by DIG [5], the most significant digit by DIG [4] and the
least significant digit by DIG [0].
The position of the segments a, b, c, d, e, f and g are shown in the diagram below:
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